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Precalculus/Trig 5

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A radio transmission tower is 120 feet tall. How long should a guy wire be if it is to be attached 15 feet from the top and is to make an angle of 26 degrees with the ground? Give your answer to the nearest tenth of a foot

  • Precalculus/Trig 5 -

    Let its length be h
    After making a sketch , I can see that
    sin 26° = 105/h
    h = 105/sin26 = 239.52

    or 239.5 ft

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